Removal of organic matter from reservoir water: mechanisms underpinning surface chemistry of natural adsorbents

Hussain, S; van Leeuwen, J; Aryal, R; Sarkar, B; Chow, CWK; Beecham, S

Removal of organic matter from reservoir water: mechanisms underpinning surface chemistry of natural adsorbents

Hussain, S van Leeuwen, J Aryal, R

Sarkar, B Chow, CWK Beecham, S

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Publication Type:: Journal Article
Citation:: International Journal of Environmental Science and Technology, 2018, 15 (4), pp. 847 - 862
Issue Date:: 2018-04-01

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Field	Value	Language
dc.contributor.author	Hussain, S	en_US
dc.contributor.author	van Leeuwen, J	en_US
dc.contributor.author	Aryal, R https://orcid.org/0000-0001-7348-4649	en_US
dc.contributor.author	Sarkar, B	en_US
dc.contributor.author	Chow, CWK	en_US
dc.contributor.author	Beecham, S	en_US
dc.date.issued	2018-04-01	en_US
dc.identifier.citation	International Journal of Environmental Science and Technology, 2018, 15 (4), pp. 847 - 862	en_US
dc.identifier.issn	1735-1472	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132910
dc.description.abstract	© 2017, Islamic Azad University (IAU). One of the key challenges in water treatment industry is the removal of organic compounds by cost-effective methods. This study evaluated the adsorptive removal of dissolved organic carbon (DOC) from reservoir water using fuller’s earth (FE) in comparison with natural (SQ) and modified quartz (MSQ) sands. The removal capacities of FE at different contact times, pH levels, adsorbent dosages and initial DOC concentrations were compared with both the quartz sands. The optimum DOC removals by FE and SQs were achieved at contact time of 60 and 30 min, pH level of 6 and 4, and at adsorbent dose of 1.5 g/150 mL and 10 g/100 mL, respectively. The adsorption capacity of FE (1.05 mg/g) was much higher compared to the MSQ (0.04 mg/g) and SQ (0.01 mg/g). Adsorption equilibrium data better fitted to the Freundlich model than to the Langmuir model, suggesting that adsorption occurred primarily through multilayer formation onto the surfaces of FE and SQ. The pseudo-second-order model described the uptake kinetics more effectively than the pseudo-first-order and intra-particle diffusion models, indicating that the mechanism was primarily governed by chemisorption. These observations were well supported by the physiochemical characteristics and charge behaviour of the adsorbents. In mass-transfer study, the results of liquid film diffusion model showed that the adsorption of DOC on FE was not controlled by film diffusion, but other mechanisms also played an essential role. This study demonstrates that FE is an effective adsorbent for the removal of DOC in surface water treatment.	en_US
dc.relation.ispartof	International Journal of Environmental Science and Technology	en_US
dc.relation.isbasedon	10.1007/s13762-017-1447-3	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.title	Removal of organic matter from reservoir water: mechanisms underpinning surface chemistry of natural adsorbents	en_US
dc.type	Journal Article
utslib.citation.volume	4	en_US
utslib.citation.volume	15	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access
pubs.issue	4	en_US
pubs.publication-status	Published	en_US
pubs.volume	15	en_US

Abstract:

© 2017, Islamic Azad University (IAU). One of the key challenges in water treatment industry is the removal of organic compounds by cost-effective methods. This study evaluated the adsorptive removal of dissolved organic carbon (DOC) from reservoir water using fuller’s earth (FE) in comparison with natural (SQ) and modified quartz (MSQ) sands. The removal capacities of FE at different contact times, pH levels, adsorbent dosages and initial DOC concentrations were compared with both the quartz sands. The optimum DOC removals by FE and SQs were achieved at contact time of 60 and 30 min, pH level of 6 and 4, and at adsorbent dose of 1.5 g/150 mL and 10 g/100 mL, respectively. The adsorption capacity of FE (1.05 mg/g) was much higher compared to the MSQ (0.04 mg/g) and SQ (0.01 mg/g). Adsorption equilibrium data better fitted to the Freundlich model than to the Langmuir model, suggesting that adsorption occurred primarily through multilayer formation onto the surfaces of FE and SQ. The pseudo-second-order model described the uptake kinetics more effectively than the pseudo-first-order and intra-particle diffusion models, indicating that the mechanism was primarily governed by chemisorption. These observations were well supported by the physiochemical characteristics and charge behaviour of the adsorbents. In mass-transfer study, the results of liquid film diffusion model showed that the adsorption of DOC on FE was not controlled by film diffusion, but other mechanisms also played an essential role. This study demonstrates that FE is an effective adsorbent for the removal of DOC in surface water treatment.

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http://hdl.handle.net/10453/132910